Last frost date in Leavenworth, KS
The average last frost in Leavenworth is April 12. By April 25 the chance of another 32°F night drops to 1 in 10. The first fall frost usually arrives about October 27, which leaves 196 frost-free days. An early freeze before October 13 happens one year in ten.
- Safe after (10% risk)
- Apr 25
- Average first frost
- Oct 27
- Frost-free season
- 196 days
- Hard freeze (28°F) ends
- Apr 3
No frost in the next 7 nights
National Weather Service forecast, updated Oct 22, 12:57 UTC
- ThuOct 2253°
- FriOct 2356°
- SatOct 2454°
- SunOct 2554°
- MonOct 2649°
- TueOct 2745°
- WedOct 2849°
Planting calendar for Leavenworth
Windows count forward or back from the average frost dates above. Click a crop for dates across Kansas.
TomatoesApr 19–May 3
PumpkinsApr 26–May 10
SunflowersApr 12–May 3
CucumbersApr 26–May 3
CornApr 19–May 3
Sweet potatoesMay 3–May 17
WatermelonApr 26–May 10
Green beansApr 19–May 10
ZucchiniApr 19–May 3
OkraMay 3–May 17
PeppersApr 26–May 10
BasilApr 19–May 3
Butternut squashApr 19–May 3
CantaloupeApr 26–May 10
EggplantApr 26–May 10
PotatoesMar 15–Mar 29
OnionsMar 1–Mar 22
CarrotsMar 22–Apr 26
LettuceMar 29–Apr 19
BroccoliMar 15–Mar 29
BeetsMar 15–Apr 26
PeasMar 1–Mar 15
CabbageMar 15–Mar 29
RadishesMar 8–Apr 19
Brussels sproutsMar 29–Apr 12
SpinachMar 1–Mar 22
CilantroMar 29–Apr 19
KaleMar 15–Mar 29
Collard greensMar 15–Mar 29
TurnipsMar 15–Mar 29
DillApr 12–Apr 26
CeleryApr 19–Apr 26
CauliflowerMar 29–Apr 12
LeeksMar 29–Apr 12
Swiss chardMar 29–Apr 26
ParsleyMar 29–Apr 19
Tulip bulbsOct 13–Nov 17
GarlicOct 6–Nov 10
Daffodil bulbsSep 29–Nov 10
StrawberriesMar 15–Mar 29
AsparagusMar 15–Mar 29Frost probabilities
| Threshold | Spring, 90% chance later | Spring, 50% | Spring, 10% | Fall, 10% chance earlier | Fall, 50% | Fall, 90% |
|---|---|---|---|---|---|---|
| Light frost, 32°F | Mar 31 | Apr 12 | Apr 25 | Oct 13 | Oct 27 | Nov 7 |
| Hard freeze, 28°F | Mar 18 | Apr 3 | Apr 17 | Oct 23 | Nov 4 | Nov 18 |
Read the spring 10% column as the date after which only one year in ten still gets frost. That is the safer date for tomatoes, peppers and basil.
Where these numbers come from
NOAA station Leavenworth (USC00144588) sits 0.4 miles from the center of Leavenworth at 870 feet. Its averages cover 1991 to 2020. Low spots, valleys and open fields can keep getting frost a week or two after the station stops; city centers and lakeshores usually get less of it.
Questions
When is the last frost in Leavenworth, KS?
The average last frost date in Leavenworth is April 12, based on NOAA 1991–2020 climate normals. There is a 10% chance of frost after April 25.
When is the first frost in Leavenworth?
The first frost in fall usually comes around October 27. One year in ten it arrives before October 13.
How long is the growing season in Leavenworth?
About 196 days between the average last and first frost.
When should I plant tomatoes in Leavenworth?
Plant tomato seedlings outside from April 19 to May 3. Start seeds indoors six to eight weeks earlier.
Nearby in Kansas
- Kansas CityApr 4
- ShawneeApr 16
- LenexaApr 10
- Prairie VillageApr 4
- OlatheApr 10
- LawrenceApr 12
- Overland ParkApr 10
- LeawoodApr 8
- GardnerApr 13
- TopekaApr 16
- ManhattanApr 16
- EmporiaApr 15